Image orientation control for a portable digital video camera

ABSTRACT

An integrated hands-free, point of view, action-sports, digital video camera (or camcorder) ( 10 ) includes: a rotary horizon adjustment controller ( 14 ) for adjusting the orientation of a horizontal image plane ( 16 ) recorded by an image sensor with respect to the orientation of a camera housing ( 22 ); a laser alignment system with laser sources ( 48 ) capable of projecting light to define a horizontal projection axis ( 52 ) that is coordinated with orientation of the horizontal image plane ( 16 ); a manually operable switch ( 80 ), which covers a microphone ( 90 ) whenever the switch ( 80 ) is in the OFF position, for controlling video data capture; and a “quick-release” mounting system ( 120 ) that retains a desired orientation of the camera ( 10 ).

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.16/664,330, filed Oct. 25, 2019, entitled “IMAGE ORIENTATION CONTROL FORA PORTABLE DIGITAL VIDEO CAMERA”, which is a continuation of U.S. patentapplication Ser. No. 15/181,112, filed Jun. 13, 2016, entitled “IMAGEORIENTATION CONTROL FOR A PORTABLE DIGITAL VIDEO CAMERA”, which is acontinuation of U.S. patent application Ser. No. 13/674,817, filed Nov.12, 2012, “IMAGE ORIENTATION CONTROL FOR A PORTABLE DIGITAL VIDEOCAMERA”, which is a divisional of U.S. patent application Ser. No.12/671,442, filed May 14, 2010, “CONTROL SWITCH FOR A PORTABLE DIGITALVIDEO CAMERA”, which is a continuation-in-part of U.S. Designapplication No. 29/322,219, filed Jul. 30, 2008, entitled “PORTABLEDIGITAL VIDEO CAMERA” and which is a U.S. national stage application ofInternational Patent Application No. PCT/US2008/071661, filed Jul. 30,2008, entitled “COMPONENTS OF A PORTABLE DIGITAL VIDEO CAMERA”, whichclaims priority benefit to U.S. Provisional Patent Application No.60/952,810, filed Jul. 30, 2007, entitled “MOBILE, WEARABLE DIGITALVIDEO CAMERA”, each of which is hereby incorporated herein by referencein its entirety.

BACKGROUND OF THE INVENTION Technical Field

The field of invention relates to point-of-view (POV) video cameras orcamcorders and, in particular, to an integrated hands-free, POV actionsports video camera or camcorder.

Background Information

First-person video cameras are a relatively new product category thathave been adapted to capture POV video by action sports enthusiasts in ahands-free manner. Conventional first-person video cameras primarilycomprise a lens that must be tethered to a separate digital videorecorder or camcorder. FIGS. 1A and 1B present pictorial views of priorart first-person video cameras requiring a tethered lens approach tocapturing first-person video recording. FIG. 1A presents a Twenty20™device, and FIG. 1B presents a Viosport™ device. FIGS. 1C and 1D presentpictorial views of prior art video cameras tethered to camcorders forimplementing the tethered lens approach to capturing first-person videorecording. FIG. 1C and FIG. 1D present Samsung™ devices.

These products are not generally hands-free products, and consumers havebeen employing their own unique mounting techniques to permit“hands-free” video recording of action sports activities. FIG. 1Epresents a pictorial view of a tethered camera attempting to facilitatehands-free POV video recording. FIG. 1E presents a Blackeye™ device.These recent devices attempt to convey image data from “tethered”cameras to separate camcorders through IR signals to eliminate thetethering cables.

More recently, integrated hands-free, POV action sports video camerashave become available. FIGS. 2A and 28 present pictorial views of twoprior art products implementing integrated solutions to first-personvideo recording. These products are still in their infancy and may bedifficult to use well.

SUMMARY OF THE INVENTION

A portable digital video camera (or camcorder) includes a camera housingand a lens.

Some embodiments of the portable digital video camera (or camcorder)comprise an integrated hands-free, POV action sports digital videocamera (or camcorder).

Some embodiments of the portable digital video camera (or camcorder) orthe integrated hands-free, POV action sports digital video camera (orcamcorder) include an image sensor for capturing image data.

Some embodiments of the portable digital video camera (or camcorder) orthe integrated hands-free, POV action sports digital video camera (orcamcorder) include a manual horizon adjustment control for adjusting anorientation of a horizontal image plane recorded by the image sensorwith respect to a housing plane of the camera housing.

Some embodiments of the portable digital video camera (or camcorder) orthe integrated hands-free, POV action sports digital video camera (orcamcorder) include a laser alignment system with one or more lasersources capable of projecting light emissions to define a horizontalprojection axis that is coordinated with orientation of the horizontalimage plane.

Some embodiments of the portable digital video camera (or camcorder) orthe integrated hands-free, POV action sports digital video camera (orcamcorder) include a microphone and a manually operable switch forcontrolling an audio and/or video data capturing operation, the switchhaving an activator that covers the microphone whenever the switch is inthe OFF position.

Some embodiments of the portable digital video camera (or camcorder) orthe integrated hands-free, POV action sports digital video camera (orcamcorder) include a “quick-release” mounting system that can be used inconjunction with the laser alignment system to adjust the image captureorientation for pitch, yaw, and roll.

Additional aspects and advantages will be apparent from the followingdetailed description of preferred embodiments, which proceeds withreference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIGS. 1A, 1B, 1C, 1D, and 1E constitute a set of pictorial views of fourprior art products implementing a tethered lens approach to capturingfirst-person video recording.

FIGS. 2A and 2B constitute a set of pictorial views of two prior artproducts implementing integrated solutions to first-person videorecording.

FIGS. 3A, 3B, 3C, 3D, 3E, and 3F are, respectively, front perspective,back perspective, side elevation, front elevation, back elevation, andtop plan views of an embodiment of an integrated hands-free, POV actionsports digital video camera.

FIG. 4A is a front perspective view of an embodiment of an integratedhands-free, POV action sports digital video camera, showing alternativepositioning of a switch and representative alternative rotation of arotary horizontal adjustment controller.

FIG. 4B is a back perspective view of an embodiment of an integratedhands-free, POV action sports digital video camera, showing arepresentative alternative number of rail cavities and an optionaldetent within a rail cavity.

FIG. 5 is a cross-sectional side view of an embodiment of an integratedhands-free, POV action sports digital video camera.

FIG. 6 is an exploded view of an embodiment of mechanical components ofan integrated hands-free, POV action sports digital video camera.

FIG. 7 is an exploded view of optical and mechanical components of anintegrated hands-free, POV action sports digital video camera.

FIGS. 8A and 8B are fragmentary cross-sectional views of the lens systemof the camera of FIG. 7, showing, respectively, a standard lens and thestandard lens fitted with a lens filter.

FIG. 9 is a partly exploded view of a versatile mounting systemdemonstrating ease of adjustment of camera mount orientation coupledwith ease of camera detachment with retention of the mount orientation.

FIG. 10 is a front perspective view of a standard mount, employing arail plug having two rails and two detents.

FIGS. 11A, 11B, 11C, and 11D are, respectively, back elevation, frontelevation, side elevation, and top plan views of the versatile mountingsystem, demonstrating the matable relationship between the camera ofFIGS. 3A-3E with the standard mount shown in FIG. 10.

FIG. 12 is a perspective view of an alternative mount, employing twomounting rails and two detents.

FIG. 13A is a front perspective view of a pole mount system, employingthe mount of FIG. 12.

FIGS. 13B and 13C are cross-sectional side views of a pole mount systemshowing, respectively, unlocked and locked configurations.

FIGS. 13D and 13E are front perspective views of a pole mount systemshowing, respectively, unlocked and locked configurations about a handlebar.

FIG. 14A is a front perspective view of an alternative pole mountsystem, employing the mount of FIG. 12 and a strap.

FIGS. 14B and 14C are respective side and front views of the alternativepole mount of FIG. 14A.

FIG. 14D is a front perspective view of the alternative pole mount ofFIG. 14A locked about a pole.

FIG. 15A is a front perspective view of a goggle mount, employing astrap entrance facing in the opposite direction of the mounting rails.

FIG. 15B is a side view of an alternative goggle mount, employing astrap entrance facing in the same direction of the mounting rails.

FIG. 15C is a fragmentary front perspective view of the alternativegoggle mount of FIG. 1B mounted upon a goggle strap.

FIG. 16 is a front perspective view of a vented helmet mount, adaptedfor employing a strap for attachment to a vented helmet.

FIG. 17 is a front perspective view of another alternative goggle mount,adapted for employing a strap for attachment to a goggle strap.

FIG. 18 is a front perspective view of an alternative pole mount system,employing the rail plug of FIG. 10.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

FIGS. 3A, 3B, 3C, 3D, 3E, and 3F are, respectively, front perspective,back perspective, side elevation, front elevation, back elevation, andtop plan views of an embodiment of an integrated hands-free, POV actionsports digital video camera 10, and FIGS. 4A and 4B are front and backperspective views of, respectively, an alternative configuration and analternative embodiment of the digital video camera 10. For purposes ofthis description, the term “camera” is intended to cover camcorder(s) aswell as camera(s). An example of such a digital video camera 10 isincluded in the VholdR™ system, marketed by Twenty20, Inc., of Seattle,Wash.

FIGS. 5, 6, 7, 8A, and 8B show optical and mechanical components of thedigital video camera 10. With reference to FIGS. 3A-3F, 4A, 4B, 5, 6, 7,8A, and 8B, some embodiments of the digital video camera 10 include amanual horizon adjustment control system 12 including a manual horizonadjustment control for adjusting an orientation of a horizontal imageplane 16 of an image recorded by an image sensor 18 with respect to ahousing plane 20 (along a vertical cross-section) of a camera housing22. An exemplary image sensor 18 may be CMOS image capture card, andprovide for minimum illumination of 0.04 Lux @ f/1.2, offer highsensitivity for low-light operation, low fixed pattern noise,anti-blooming, zero smearing, and low power consumption.

With reference to FIGS. 3A, 3C, 3F, 4A, 6, and 7, in some embodiments,the manual horizon adjustment control is a rotary controller 14 thatrotates about a control axis 24 such that manual rotation of the rotarycontroller 14 changes the orientation of the horizontal image plane 16with respect to the housing plane 20. The manual horizon adjustmentcontrol can be used to offset the horizontal image plane 16 with respectto the pitch, yaw, and roll of the mounting position of the camerahousing 22.

In some preferred embodiments, the rotary controller 14 is positionedabout a lens 26 and cooperates with a lens shroud 32 to support the lens26 within the camera housing 22 such that manual rotation of the rotarycontroller 14 rotates the lens 26 with respect to the camera housing 22.In other embodiments, the lens 26 may remain fixed with respect to thecamera housing 22 even though the rotary controller 14 rotates aroundthe lens 26. In some embodiments, the lens 26 is a 3.6 mm, ¼″ 4G type,glass eye lens with a 90° viewing angle and a focal length covering alarge range, such as from arm's length (e.g., 500 mm) to infinity, whichfocuses visual information onto the image sensor 18 at a resolution,such as at 640×480. Skilled persons will appreciate that a variety oftypes and sizes of suitable lenses are commercially available.

In some preferred embodiments, the image sensor 18 is supported inrotational congruence with the orientation of the rotary controller 14such that manual rotation of the rotary controller 14 rotates the imagesensor 18 with respect to the housing plane 20 of the camera housing 22.When the image sensor 18 has a fixed relationship with the orientationof the rotary controller 14, the image data captured by image sensor 18does not require any post capture horizon adjustment processing toobtain play back of the image data with a desired horizontal image plane16. In particular, the rotary controller 14 can be set to a desiredhorizontal image plane 16, and the image sensor 18 will capture theimage data with respect to the orientation of the horizontal image plane16. In some embodiments, the image sensor 18 may remain fixed withrespect to the camera housing 22 even though the rotary controllerrotates around the image sensor 18.

With reference to FIGS. 6, 7, 8A, and 8B, in some embodiments, anexemplary optical assembly 34 shows how the image sensor 18 and the lens26 may be supported in rotational congruence by the cooperation of thelens shroud 32, an internal rotation controller 36, and the rotarycontroller 14. In some preferred embodiments, the rotary controller 14may be separated from the camera housing 22 by a gap 37 to facilitatethe rotation of the rotary controller 14 with respect to the camerahousing 22.

A lens cap holder 38 may be secured to the rotary controller 14 by screwthreads and cooperates with an O-ring 40 a and to provide support for alens cover 42 (such as a piece of glass). A lens holder 44 and a lensassembly holder 46 may also be employed to support the lens 26 in adesired position with respect to the other components in the opticalassembly 34. The lens assembly holder 46 may be secured to the lens capholder 38 by screw threads and an O-ring 40 b. An O-ring or bearings 43may be employed between the lens assembly holder 46 and the main housing100 to facilitate the rotation of the lens assembly holder 46 about thecontrol axis 24 with respect to the main housing 100. A set screw 45 maybe employed to secure the lens assembly holder 46 of optical assembly 34to the main housing 100 without impeding the rotation of the lensassembly holder 46 or the components within it. In some embodiments, therotary controller 14, the lens cap holder 38, the O-ring 40 a, the lenscover 42, the lens shroud 32, the laser sources 48, the lens 26, thelens holder 44, the image sensor 18, the internal rotation controller36, the O-ring 40 b, and the lens assembly holder 46 of optical assembly34 may rotate together. Skilled persons will appreciate that several ofthese components may be fixed with respect to the camera housing 22 ortheir synchronized rotation may be relaxed. For example, the lens cover42, the lens 26, and the lens holder 44 need not rotate.

With reference to FIG. 8B, the rotary controller 14 may support a lensfilter or other lens component, or the rotary controller may includescrew threads or other means to enable attachment of additional oralternative lens components.

In some embodiments, the rotary controller 14 cooperates with an encoderto orient the image sensor 18 to the desired horizontal image plane 16.Alternatively, the encoder could guide post capture horizon adjustmentprocessing to adjust the horizontal image plane 16 of the captured imageso that it is transformed to play back the image data with the encodedhorizontal image plane 16.

In some embodiments, the rotary controller 14 is positioned in anarbitrary location away from the lens 26 and/or in an arbitraryrelationship with the position of the image sensor 18. In one example,the rotary controller 14 may be positioned on a side 28 of the camerahousing 22 or a back door 30 and may remotely control the orientation ofthe image sensor 18 or may control an encoder. Skilled persons willappreciate that an arbitrarily located manual horizon adjustment controlneed not be a rotary and may be electronic instead of mechanical.

In some embodiments, the rotary controller 14 provides greater than orequal to 180 degree rotation of the horizontal image plane 16 withrespect to the housing plane 20 of the camera housing 22 in each of theclockwise and counterclockwise directions. In one example, the rotarycontroller provides 180 degrees plus greater than or equal to sixdegrees of additional rotation in each direction, providing a 192-degreerotation of the horizontal image plane 16 with respect to the housingplane 20. This adjustability includes embodiments in which theorientation of the rotary controller 14 is in congruence with theorientation of the image sensor 18 as well as embodiments employing anencoder. Preferably, both the lens 26 and the image sensor 18 rotatetogether 192 degrees within a pivoting hermetically sealed capsule. Thismeans no matter how an operator mounts the digital video camera 10, theimage sensor 18 can be rotated to capture a level world.

With reference to FIGS. 4A and 4B, in some embodiments, a rotationindicator 54 is provided on an exterior surface 56 of the rotarycontroller 14. The rotation indicator 54 may take the form of ahorizontal notch or raised bar that may or may not be coloreddifferently from the color of camera housing 22. The camera housing 22may have a similar or smaller notch or raised bar 58 of the same ordifferent color that is fixed in one position. The dislocation betweenthe rotation indicator 54 and the horizontal notch 58 provides aphysical indication of the amount that the rotary controller 14 isdisplaced from its “home” position with respect to the camera housing22.

In some preferred embodiments, the rotation indicator 54 and thehorizontal notch 58 are in a collinear alignment (in the “home”position) when the horizontal image plane 16 is perpendicular to thehousing plane 20. Thus, if the digital video camera 10 were set on alevel horizontal surface and the two notches were collinear, thehorizontal image plane would be horizontal.

With reference to FIGS. 3A, 3C, 3D, 3F, 4A, 7, and 8 in preferredembodiments, one or more laser sources 48 are fitted within the rotarycontroller 14, are oriented with the horizontal image plane 16, and arecapable of projecting light emission(s) to define a horizontalprojection axis or plane 52 that is parallel with or coplanar with thehorizontal image plane 16. Thus, manual rotation of the rotarycontroller 14 changes the orientation of the horizontal projection axis52 with respect to the housing plane 20 as the orientation of thehorizontal image plane 16 is changed with respect to the horizontalprojection axis 52. The beam(s) of light forming the horizontalprojection axis 52 can be used as a guide by an operator to facilitateadjustment of the horizontal image plane 16 by simple rotation of therotary controller 14 after the camera housing 22 has been mounted.

In some embodiments, a single laser source 48 may employ beam shapingoptics and or a beam shaping aperture, filter, or film to provide adesired beam shape such as a line, lines of decreasing or increasingsize, or a smiley face. In some embodiments, only a single beam shape isprovided. In some embodiments, multiple beam shapes are provided and canbe exchanged such as through manual or electronic rotation of a laserfilter. Skilled persons will appreciate that two or more laser sources48 may be outfitted with beam shaping capabilities that cooperate witheach other to provide the horizontal projection axis 52 or an image thatprovides the horizontal projection axis 52 or other guidance tool.

In some embodiments, two laser sources 48 (or two groups of lasersources) are employed to project two beams of light that determine thehorizontal projection axis 52. The two laser sources 48 may be mountedon opposite sides of the lens 26 such that their positions determine alaser mounting axis that bisects the lens 26. In some embodiments, thelens shroud 32 provides support for laser sources 48 such that they arepositioned to emit light through apertures 60 in the lens shroud 32(FIG. 7). In some embodiments, an alternative or additional opticalsupport barrel 32 a may support the laser source 48 and the otheroptical components.

The laser sources 48 may be diode lasers that are similar to those usedin laser pointers. The laser sources 48 preferably project the samewavelength(s) of light. In some embodiments, an operator may selectbetween a few different wavelengths, such as for red or green, dependingon contrast with the background colors. In some embodiments, twowavelengths may be projected simultaneously or alternately. For example,four laser sources may be employed with red and green laser sources 48positioned on each side of lens 26 such that red and green horizontalprojections axes 52 are projected simultaneously or alternately in theevent that one of the colors does not contrast with the background.

In some embodiments, the laser sources 48 may be responsive to a powerswitch or button 64, which in some examples may be located on the backdoor 30 of the camera housing 22. A rotation of horizon adjustmentcontrol system 12 or the rotary controller 14 may provide the lasersources 48 with an ON condition responsive to a timer, which may bepreset such as for five seconds or may be a user selectable time period.Alternatively, a single press of the button 64 may provide the lasersources 48 with an ON condition with a second press providing an OFFcondition. Alternatively, a single press of the button 64 may provide anON condition responsive to a timer, which may be preset such as for fiveseconds or may be a user selectable time period. Alternatively, thebutton 64 may require continuous pressure to maintain the laser sources48 in an ON condition. The button 64 may also control other functionssuch as standby mode. Skilled persons will appreciate that manyvariations are possible and are well within the domain of skilledpractitioners.

Skilled persons will also appreciate that any type of video screen, suchas those common to conventional camcorders, may be connected to or be apart of camera housing 22. Such video screen and any associated touchdisplay may also be used as feedback for orientation in conjunction withor separately from the laser sources 48. Skilled persons will appreciatethat the video screen may take the form of a micro-display mountedinternally to the camera housing 22 with a viewing window to the screenthrough the camera housing 22 or may take the form of an external LCDscreen.

With reference to FIGS. 3A, 3 b, 3C, 3F, 4A, 4B, 5, and 6, in preferredembodiments, the digital video camera 10 has a manually operable switchactivator 80 that controls the recording condition of the image sensor18 and/or conveyance of the acquired image data to a data storagemedium, such as on a two-gigabyte MicroSD card. In some embodiments, thedigital video camera 10 is designed to use pulse power to conservebattery life while monitoring the switch activator 80. When the switchactivator 80 is positioned to the ON position, the pulse power system isinstructed to provide full power to the electronics and begin recordingimmediately; similarly, when the switch activator 80 is positioned tothe OFF position, the pulse power system is instructed to cut power tothe electronics and stop recording immediately.

In some preferred embodiments, when the switch activator 80 is slid ortoggled, it moves a magnetic reed that is recognized from an impulsepower sensor. Once the sensor recognizes the magnetic reed has beentoggled to the ON position, the pulse power system is then triggered topower up most or all of the electronics of the digital video camera 10,including all of the electronics required for recording as well asselected other electronics or simply all the electronics. Once fullpower is provided to the system electronics, a feed from the imagesensor 18 begins encoding and writing to the data storage medium. Assoon as the first frames are written to the data storage medium, asignal is sent to an LED 82 to indicate via a light pipe 84 that thedigital video camera 10 is recording. Thus, activation of the switchactivator 80 initiates recording nearly instantaneously.

In some embodiments, the switch activator 80 powers up the electronicsand initiates recording from a standby mode such as after the button 64has been pushed to activate the pulse power mode. In other embodiments,the switch activator 80 powers up the electronics and initiatesrecording directly without any pre-activation. In some embodiments, avideo encoder that cooperates with the image sensor and a microprocessorprovides instructions to the video encoder. In some embodiments, theswitch activator 80 is adapted to substantially simultaneously controlsupply of power to the microprocessor, the image sensor, and the videoencoder, such that when the switch activator 80 is placed in the ONposition the microprocessor, the image sensor, and the video encoder allreceive power substantially concurrently and thereby substantiallyinstantaneously initiate a video data capturing operation.

In some embodiments, an audio encoder cooperates with the microphone 90,and the microprocessor provides instructions to the audio encoder. Insome embodiments, the switch activator 80 is adapted to substantiallysimultaneously control the supply of power to the microphone 90 and theaudio encoder such that when the switch activator 80 is placed in the ONposition, the microprocessor, the microphone, and the audio encoder allreceive power substantially concurrently and thereby substantiallyinstantaneously initiate an audio data capturing operation.

In some embodiments, when the switch activator 80 is placed in the OFFposition, the microprocessor, the image sensor, and the video encoderall cease to receive power substantially concurrently and therebysubstantially instantaneously cease the video data capturing operation.In some embodiments, when the switch activator 80 is placed in the OFFposition, the microprocessor, the microphone 90, and the audio encoderall cease to receive power substantially concurrently and therebysubstantially instantaneously cease the audio data capturing operation.

In some embodiments, the microprocessor, the image sensor 18, the videoencoder, the microphone 90, and the audio encoder all receive powersubstantially concurrently and thereby substantially instantaneouslyinitiate the video data and audio data capturing operations. In someembodiments, the microprocessor, the image sensor 18, the video encoder,the microphone 90, and the audio encoder all cease to receive powersubstantially concurrently and thereby substantially instantaneouslycease the video data and audio data capturing operations.

In some embodiments, the switch activator 80 controls supply of power toadditional electronics such that the additional electronics aredeactivated when the switch activator 80 is in the OFF position and suchthat the additional electronics are activated when the switch activator80 is in the ON position.

Skilled persons will appreciate that the switch activator 80 may bedesigned to have more than two slide settings. For example, in additionto ON and OFF settings for recording, switch activator 80 may provide anintermediate setting to activate laser sources 48, to activate one ormore status indicators, or initiate other functions in the digital videocamera 10.

The use of a magnetic reed switch as an embodiment for the switchactivator 80 prevents water or other fluids from entering through thecamera housing 22. Skilled persons will appreciate that other waterproofON/OFF switch designs are possible. In preferred embodiments, digitalvideo camera 10 also employs a waterproof microphone 90, such as anomni-directional microphone with a sensitivity (0 dB=1V/Pa, 1 KHz) of−44±2 dB and a frequency range of 100-10,000 Hz, for capturing audiodata and providing it to the data storage medium or to a second datastorage medium. Alternatively, the camera housing 22 may includebreathable, watertight materials (such as GoreTex™) to prevent theegress of water without requiring a waterproof microphone 90. Skilledpersons will appreciate that microphones 90 with a large variety ofoperational parameters are commercially available or can be manufacturedto suit desired criteria.

In some embodiments, the microphone 90 is positioned beneath the switchactivator 80 such that the switch activator 80 covers the microphone 90whenever the switch activator 80 is in the OFF position and such thatthe switch activator 80 exposes the microphone 90 whenever the switchactivator 80 is in the ON position. The audio data capturing operationis preferably deactivated when the switch activator 80 is in the OFFposition and that the audio data capturing operation is preferablyactivated when the switch activator 80 is in the ON position. The ON andOFF conditions of the audio data capturing operation may be controlledby the switch activator 80 in conjunction with the ON and OFF conditionsof the video capturing operation.

With reference to FIGS. 5 and 6, in some embodiments, the camera housing22 includes a main housing 100 that supports the switch activator 80, afront and bottom trim piece 106, and the back door 30 which is connectedto the main housing 100 through a hinge 102. In some embodiments, theback door 30 may be removable through its hinge 102 to allow connectionof accessories to the main housing 100 for extended functionality. Theback door 30 may provide an area of thinner material to permitcompression of the button 64. Gaskets 114 may be seated between the mainhousing 100 and the back door 30 to provide waterproofing. A housingcover 108 may be connected to the main housing 100 through a rubbergasket 110 that also enhances the waterproof characteristics of thecamera housing 22.

Side caps 112 may be ultrasonically welded to the exterior surfaces ofthe housing cover 108 and the lower portion of the main housing 100,which form the lower portions of the sides 28 of the camera housing 22.In some embodiments the camera housing 22 is made from brushed aluminum,baked fiberglass, and rubber. In particular, the main housing 100, thehousing cover 108, and the side caps 112 may be made from aluminum. Thefront and bottom trim piece 106 may also be ultrasonically welded to themain housing 100.

With reference to FIGS. 3A, 3B, 4A, 4B, 6, and 9, in preferredembodiments, the digital video camera 10 includes part of a mountingsystem 120 that has two or more housing rail cavities 122 and two ormore interleaved housing rails 124 on each side 28 of camera housing 22for engaging a versatile mount 126. An example of such a mounting system100 is the TRail™ mounting system, marketed by Twenty20, Inc, ofSeattle, Wash.

The housing rail cavities 122 and housing rails 124 may be formed by cutouts in the side caps 112 that are mounted to the main housing 100. Insome embodiments, digital video camera 10 is bilaterally symmetrical andhas an equal number of housing rail cavities 122 on each of the sidecaps 112 and an equal number of housing rails 124 on each of the sidecaps 112. In some embodiments, digital video camera 10 may for exampleprovide two housing rail cavities 122 (such as shown in FIGS. 3A and 3B)or three housing rail cavities 122 in each side cap 112 (such as shownin FIGS. 4A and 4B). Skilled persons will appreciate, however, that insome embodiments, digital video camera 10 need not be symmetrical andmay have an unequal number of rail cavities 122 on its side caps 112.

In some embodiments, the rail cavities 122 have a “T”-like, wedge-like,or trapezoid-like cross-sectional appearance. Skilled persons willappreciate that the dimensions of the stem or lateral branches of the“T” can be different. For example, the stem can be thicker than thebranches, or one or more of the branches may be thicker than the stem;similarly, the stem can be longer than the branches, and one or more ofthe branches may be longer than the stem. The cross-sectional shapes mayhave flat edges or corners, or the edges or corners may be rounded.Skilled persons will also appreciate that numerous other cross-sectionalshapes for the rail cavities are possible and that the cross-sectionalshapes of different housing rail cavities 122 need not be the samewhether in the same side cap 112 or in different side caps 112.Similarly, the housing rail cavities 122 may have different lengths andthe housing rails 124 may have different lengths. The bottom of trimpiece 106 may be alternatively or additionally fitted with housing rails124.

In some embodiments, one or more of the housing rail cavities 122 maycontain one or more bumps or detents 128. In some embodiments, each side28 of camera housing 22 contains at least one bump or detent 128. Insome embodiments, each housing rail cavity 122 contains at least onebump or detent 128. In some examples, however, only a single housingrail cavity 122 on each side 28 contains a bump or detent 128. Skilledpersons will appreciate that the different sides 28 need not contain thesame number of nubs or detents 128.

FIG. 9 shows a mount base 130 and a rail plug 132 that fit together toform a flat surface mount 134 shown in FIG. 10. FIGS. 11A-11D (FIG. 11)depict different views of the camera housing 22 mated with the flatsurface mount 126. With reference to FIGS. 9-11, the rail plug 132contains one or more mount rails 136 that are adapted to mate with thehousing rail cavities 122 on camera housing 22. Similarly, the rail plug132 contains one or more mount rail cavities 138 that are adapted tomate with the housing rails 124 on camera housing 22. The mount rails136 may have the same or different cross-sectional shapes as those ofhousing rails 124, and the mount rail cavities 138 may have the same ordifferent cross-sectional shapes as those of the housing rail cavities122. In some preferred embodiments, the rails 124 and 136 and cavities122 and 138 have the same cross-sectional profiles.

In some embodiments, one or more of the mount rails 136 on the rail plug132 may contain one or more detents or bumps 140. In some embodiments,each mount rails 136 contains at least one detent or bump 140. In someexamples, however, only a single mount rail 136 contains a detent orbump 140. The detents or bumps 140 are adapted to mate with the bumps ordetents 128 such that if the camera housing 22 has detents 128 then therail plug 132 has bumps 140 or if the camera housing 22 has bumps 128then the rail plug 132 has detents 140. Skilled persons will appreciatethat in some alternative embodiments, the housing rails 124 have thebumps or detents 128 and the mount rail cavities 138 have the detents orbumps 140.

The versatile mounting system 120 provides for ease of mounting andorientation of the digital video camera 10 with ease of detachment ofthe digital video camera 10 with retention of the mounted orientation.In some embodiments, the base mount 130 may have a very small footprintand may be attached to a surface with an adhesive pad designed foroutdoor use. After the base mount 130 has been attached to a surface,the rail plug 132 can be detached from the base mount 130.

In some embodiments, the rail plug 132 has a circumferential saw-toothededge 142 that is mated to a saw-tooth-receiving inside edge 144 of abase mount cavity 146 adapted to receive the rail plug 132. In someembodiments, the rail plug 132 has a compression fit within the basemount 130. In some embodiments, hook and loop double-toothed Velcro™ maybe used instead of or in addition to a compression fit technique tofurther secure the rail plug 132 within the base mount 130.

The mount rails 136 of the rail plug 132 can slide into the housing railcavities 122 of the camera housing 22 as the mount rail cavities 138 ofthe rail plug 132 slide onto the housing rails 124 of the camera housing22 as indicated by arrow 148 to secure the rail plug 132 to the camerahousing 22. The mated detents and bumps 128 and 140 can be engaged toprevent unintended lateral movement of the rail plug 132 with respect tothe camera housing 22. The rail plug 132 with the attached digital videocamera 10 can be rotated from zero to 36 degrees within a planeperpendicular to the base mount 130 to capture a desired viewing angle.Then, the rail plug 132 can be inserted or re-inserted into the basemount 130 as indicated by arrow 150. FIG. 11 shows from severaldifferent views how the mated digital video camera 10, the rail plug132, and the mount base 130 appear when they are mated together.

In some embodiments, the rail plug 132 and base mount 130 may be madefrom a hard, but flexible material such as rubber or a polymer withsimilar properties, but skilled persons will appreciate that the railplug 132 and base mount 130 may be made from a hard or soft plastic. Asthe base mount 130 can be flexible, it can be attached to a variety ofsurfaces such as the surfaces of helmets, snowboard decks, skis, fueltanks, windows, doors, vehicle hoods, etc. The material and flexibilityof the material of the flat mount 126 may provide a “rubber” dampeningaffect as well as enhance rail sliding, rail engagement, and plugengagement. The mounting system 120 may also include a runaway leash(not shown).

When recording of an activity is completed, the rail plug 132 with theattached digital video camera 10 may be disengaged from the base mount130 for safe storage or data uploading. The base mount 130 can be leftattached to the surface and need not be re-attached and/or re-adjusted.Alternatively, the camera housing 22 may be disengaged from the railplug 132, leaving the rail plug 132 engaged with the base mount 130 sothat the original orientation of the mount rails 136 of the rail plug132 is maintained to permit quick reattachment of the digital videocamera 10 without requiring its orientation to be re-adjusted to thebase mount 130 or the person, equipment, or vehicle to which the basemount 130 is mounted.

FIG. 12 shows an alternative rail plug 132 a; and FIGS. 13A, 13B, 13C,13D, and 13E (FIG. 13) show several views of the rail plug 132 a with analternative base mount 130 a, including locked and unlockedconfigurations, to form a pole mount 126 a for mounting on a pole 160such as handle bars. With reference to FIGS. 12 and 13, the rail plug132 a may be used as a stand-alone mount with an adhesive backing or itmay be used in conjunction with or integrated into one or more varietiesof base mounts 130 a. The rail plug 132 a may be attached to the basemount 130 a through the use of an adhesive mounting, through the use ofVelcro™, through the use of a screw, through the use of otherconventionally known means, or combinations thereof. The mount rails 136may be formed to provide an aperture 162 to provide access for a screwand screwdriver to mount the rail plug 132 a onto base mount 130 a.

The base mount 130 a is configured to open and close around poles 160,particularly poles of standardized recreational equipment and especiallysuch poles having small diameters such as 1-1.5 inches (2.5-3.8 cm). Insome embodiments, the base mount 130 a has a locking pin 164 with a head166 that can be secured within a lock chamber 168. The locking pin 164increases compression against the pole 160 to prevent the base mount 130a from rotating around the pole 160 after its desired positioned isestablished. The base mount 130 a may also be provided with a pin doorcover 170 to prevent debris from accessing the locking pin 164 or thelock chamber 168.

FIGS. 14A, 14B, 14C, 14D, and 14E (FIG. 14) show several views of a railplug 132 b with an alternative base mount 130 b, including a strap 172,to form a pole mount 126 b for mounting on a pole 160 b such as a rollcage, a windsurfing mast, or a hang glider support. With reference toFIG. 14, in some embodiments, the strap 172 is large enough toaccommodate poles 160 b having a diameter up to four inches (12 cm) orlarger. In some embodiments, a dial 174 may be employed to tighten andloosen the strap 172. In other embodiments, the dial 174 controls theswivel of the rail plug 132 with respect to the base mount 130 b so thatthe side-to-side angle of the digital video camera 10 can be adjusted.As with the rail plug 132 a, the rail plug 132 b may be attachable tothe base mount 130 b or may be integrated with it.

FIGS. 15A, 15B, and 15C (FIG. 15) show one view of a rail plug 132 e andshow several views of a rail plug 132 c with an alternative base mount130 c to a band or strap mount 126 c for mounting on a belt, strap, orband 180, such as the band 180 of a pair of goggles 182. As withprevious embodiments, the rail plugs 132 e and 132 c may be attachableto the base mount 130 c or may be integrated with it. With reference toFIG. 15A, the base mount 130 c has a dampener 184 a and a strap entrance186 a on an interior side of the base mount 130 c, i.e., facing in theopposite direction of the mounting rails 136. The dampener 184 a may bemade from rubber or other suitable cushioning material to cushion auser's head away from the digital video camera.

With reference to FIG. 15B, the base mount 130 c has a dampener 184 b onan interior side of the base mount 130 c, i.e., facing in the oppositedirection of the mounting rails 136. However, the base mount 130 c has astrap entrance 186 b on an exterior side of the base mount 130 c, i.e.,facing in the same direction of the mounting rails 136. FIG. 15C showsthe base mount 130 of FIG. 15B mounted upon the strap 180 of the goggle182. Skilled persons will appreciate that the rail plug 132 a can besubstituted for the rail plugs 132 e or 132 c.

FIG. 16 shows a rail plug 132 d with an alternative base mount 130 d toa helmet mount 126 d for mounting on a vented helmet. The helmet mount126 includes one or more slots 190 through which a strap can be used tosecure the base mount 130 d to a helmet through vent slots in thehelmet. Skilled persons will appreciate that the rail plug 132 a can besubstituted for the rail plug 132 d.

FIG. 17 is a front perspective view of another alternative goggle basemount 130 f, adapted for employing a strap 192 for attachment to agoggle strap 180. The strap 192 can be looped through buckles 194 and196 to secure the base mount 130 f to the goggle strap 180. The basemount 130 f is adapted to receive the circular rail plug 132 (of FIG.10) that permits 360-degree rotation of the mounting rails 136. Suchembodiments permit a user adjust the angle of the digital video camera10 to be different than the vertical viewing angle of the user. Forexample, the user can be viewing down at the ground while the digitalvideo camera 10 (and its image sensor 18) captures images straightahead. In some embodiments, the base mount 130 f may include pads 198and 202 to dampen against vibrations and may include retaining tabs 200to prevent the rail plug 132 from being inadvertently jarred loose. Thestrap 192 may also or alternatively include pads 204 and 208.

Skilled persons will appreciate that base mounts 130 a through 130 d canalso alternatively be configured to receive a round rail plug 132 (ofFIG. 10) that permits 360-degree rotation of the mounting rails 136. Forexample, FIG. 18 shows an alternative pole mount 126 g having a basemount 130 g adapted to receive the circular rail plug 132 that permits360-degree rotation of the mounting rails 136. Such embodiments canfacilitate compensation for handle bars or other poles 160 or 160 b thatmay be angled backward or forward.

In some embodiments, the base mount 130 g has a different lockingmechanism than that of base mount 130 a (FIG. 13). For example, in someembodiments, a locking pin 210 is attached by a hinge 212 to the basemount 130 g, and the locking pin 210 is also attached at its other endto a pin door cover 214 through a hinge 216. The locking pin 210cooperates with the hinge door cover 214 to increase compression againstthe pole 160 to prevent the base mount 130 g from rotating around thepole 160 after its desired position is established. Skilled persons willappreciate that the base mount 130 a may alternatively employ thislocking mechanism. In some embodiments, the base mounts 130 a and 130 ginclude a pole grip 218 to help maintain a preferred orientation of thebase mounts 130 a and 130 g with respect to the pole 160. In someembodiments, base mounts 130 and 130 a-130 g may include a leash ring220 adapted to receive a lease line that may be attached to anassociated rail plug 132 (132 a-132 d), the digital video camera 10, orthe operator.

With reference again to FIGS. 3B, 3E, and 5, the button 64 (or anadditional button 200) may control one or more status indicators such asthe LED 82 that indicates via the light pipe 84 that the digital videocamera 10 is recording. The button 64 (or an additional button 220) may,for example, also control operation of an LED 222 that indicates througha light pipe 224 the power status of a battery (not shown). In someembodiments, a single push controls two or more status indicators (orall of the status indicators, and may control the laser sources 48 and arecording standby mode as well).

In some embodiments, the status indicators may provide a different colordepending on the status of the item in question. In some embodiments,green, yellow, and red LEDs are used to indicate whether the battery iscompletely charged, half-charged, or nearly depleted. Similarly, in someembodiments, green, yellow, and red LEDs are used to indicate whetherthe SD memory card is nearly empty, half-empty, or nearly full. In otherembodiments, green light indicates greater than or equal to 80% space orcharge, yellow light indicates greater than or equal to 30% space orcharge, and red light indicates less than 30% space or charge. Skilledpersons will appreciate that the number and meaning of colors can bevaried. The camera housing 22 may provide symbols indicating what itemsthe light pipes 84 and 224 designate, such as battery symbol 226 andmemory card symbol 228 on the door 30.

To facilitate an easier and more manageable process for the video onceit has been recorded, the digital video camera 10 may be designed toautomatically segment the video into computer and web-ready file sizes.The segment can be automatically determined by the hardware during therecording process without intervention by the user. In some embodiments,software will automatically close a video file and open a new file atpredefined boundaries. In some embodiments, the boundaries will betime-based, for example, ten minutes for each segment, or size-based,for example 10 MB for each segment. Additionally, the segmentationprocess may be designed so that file boundaries are based on presetlimits or so that the user can adjust the segment length to the user'sown preferred time. In some embodiments, the video encoder (hardware orsoftware based) will optimize the file boundary by delaying the boundaryfrom the nominal boundary position until a period of time withrelatively static video and audio, i.e., when there are minimal changesin motion. Skilled persons will appreciate, however, that in someembodiments, such segmentation may be implemented via software orhardware.

The digital video camera 10 is an all-in-one, shoot and store digitalvideo camcorder and is designed to operate in extreme weather conditionsand in a hands-free manner. The digital video camera 10 is wearable anddesigned for rugged environments (water, heat, cold, extremevibrations), and the VholdR™ system includes application mounts 126 toattach to any person, equipment, or vehicle. The internal components ofthe digital video camera 10 may be silicon treated, coated, or otherwiseinsulated from the elements, keeping the digital video camera 10operational, no matter the mud, the dirt, the snow, and the rain.

It will be obvious to those having skill in the art that many changesmay be made to the details of the above-described embodiments withoutdeparting from the underlying principles of the invention. For example,skilled persons will appreciate that subject matter revealed in anysentence or paragraph can be combined with subject matter from some orall of the other sentences or paragraphs, except where such combinationsare mutually exclusive. The scope of the present invention should,therefore, be determined by the following claims.

What is claimed is:
 1. A digital video camera, comprising: a camerahousing having a length a width, and a height, wherein the length isgreater than the width; a lens coupled to the camera housing; and animage sensor located within the camera housing and configured to capturelight propagating through the lens and produce image data of a scene,wherein a lower portion of the camera housing relative to the lens andthe image sensor comprises a plurality of protrusions configured toprotrude from the camera housing, wherein the plurality of protrusionsare configured to extend away from the lower portion of the camerahousing in a same direction, wherein the plurality of protrusions definea plurality of cavities, and wherein a width of each of the plurality ofcavities is parallel to the width of the camera housing such that acamera interface of a mount can slidably engage with the plurality ofcavities in a direction parallel to the length of the camera housing. 2.The digital video camera of claim 1, wherein each of the plurality ofcavities has a rounded cross-sectional shape, and wherein the width ofeach of the plurality of cavities corresponds to a width of the roundedcross-sectional shape.
 3. The digital video camera of claim 1, whereinthe lower portion of the camera housing is a bottom of the camerahousing.
 4. The digital video camera of claim 3, wherein the pluralityof protrusions extend from the camera housing in a vertical directionrelative to a horizontal image plane of the image sensor.
 5. The digitalvideo camera of claim 3, wherein each of the plurality of cavities has arounded cross-sectional shape, and wherein the width of each of theplurality of cavities corresponds to a width of the roundedcross-sectional shape.
 6. The digital video camera of claim 1, whereinthe plurality of protrusions extend from the camera housing in adirection that is perpendicular to the length of the camera housing. 7.The digital video camera of claim 6, wherein each of the plurality ofprotrusions has a rounded cross-sectional shape.
 8. The digital videocamera of claim 1, wherein a quantity of the plurality of protrusions isequal to a quantity of the plurality of cavities.
 9. A digital videocamera, comprising: a camera housing having a length a width, and aheight, wherein the length is greater than the width; a lens coupled tothe camera housing; and an image sensor located within the camerahousing and configured to capture light propagating through the lens andproduce image data of a scene, wherein a lower portion of the camerahousing relative to the lens and the image sensor comprises: a pluralityof protrusions configured to protrude from the camera housing whereinthe plurality of protrusions are configured to extend away from thelower portion of the camera housing in a same direction, and a cavity,wherein a width of the cavity is oriented parallel to the width of thecamera housing such that a camera interface of a mount can slidablyengage with the cavity lengthwise with the camera housing.
 10. Thedigital video camera of claim 9, wherein the lower portion of the camerahousing is a bottom of the camera housing.
 11. The digital video cameraof claim 10, wherein each of the plurality of protrusions extend fromthe camera housing in a vertical direction relative to a horizontalimage plane of the image sensor.
 12. The digital video camera of claim10, wherein the plurality of protrusions extend from the camera housingin a direction that is perpendicular to the length of the camerahousing.
 13. The digital video camera of claim 12, wherein each of theplurality of protrusions has a rounded cross-sectional shape.
 14. Thedigital video camera of claim 9, wherein the lower portion of the camerahousing relative to the lens and the image sensor further comprises amount interface.
 15. A digital video camera, comprising: a camerahousing having a length a width, and a height, wherein the length isgreater than the width; a lens coupled to the camera housing; and animage sensor located within the camera housing and configured to capturelight propagating through the lens and produce image data of a scenes,wherein a bottom portion of the camera housing relative to the lens andthe image sensor comprises: a plurality of protrusions configured toprotrude from the bottom portion of the camera housing, wherein theplurality of protrusions are configured to extend away from the bottomportion of the camera housing in a same direction, and a plurality ofcavities having a rounded cross-sectional shape, wherein a width of therounded cross-sectional shape of the plurality of cavities is orientedparallel to the width of the camera housing to enable an interface of amount to slidably engage with the plurality of cavities in a directionthat is parallel to the length of the camera housing.
 16. The digitalvideo camera of claim 15, wherein a length of the plurality of cavitiesis parallel to the length of the camera housing.
 17. The digital videocamera of claim 15, wherein a quantity of the plurality of protrusionsis equal to a quantity of the plurality of cavities.
 18. A digital videocamera, comprising: a camera housing having a length a width, and aheight, wherein the length is greater than the width; a lens coupled tothe camera housing; and an image sensor located within the camerahousing and configured to capture light propagating through the lens andproduce image data of a scene, the image data having a horizontal imageplane, wherein a lower portion of the camera housing relative to thelens and the image sensors comprises a plurality of protrusionsconfigured to protrude from the camera housing vertically relative tothe horizontal image plane, wherein the plurality of protrusions areconfigured to extend away from the lower portion of the camera housingin a same direction, and a plurality of cavities, wherein a width ofeach of the plurality of cavities is parallel to the width of the camerahousing and a depth or length of each of the plurality of cavities isparallel to the length of the camera housing.
 19. The digital videocamera of claim 18, wherein a quantity of the plurality of protrusionsis equal to a quantity of the plurality of cavities.
 20. The digitalvideo camera of claim 18, wherein each of the plurality of cavities hasa rounded cross-sectional shape, wherein the width of each of theplurality of cavities corresponds to a width of the roundedcross-sectional shape.